From patchwork Tue Jul 9 14:35:02 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Roman Smirnov X-Patchwork-Id: 812499 Received: from mx01.omp.ru (mx01.omp.ru [90.154.21.10]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id EB53019D89D for ; Tue, 9 Jul 2024 14:35:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=90.154.21.10 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720535752; cv=none; b=g8dT2WmHVo20rxW4m6fuRV4k8xeL0hRIXyzjYqWLKBwGiAKcuC12ngVEQac+S1/v7UP8uMnkulX/trzMcJNk/Oa16uuNeaTs1GGA7rpI12aqmW+crqRufOXlRl8im66y0qtn6n/xfjIpZue0FeTePJj3ISadYPxVngcopx5NYsA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720535752; c=relaxed/simple; bh=zbITHsIUUE0Ji1/YBq0mag53WJ4gNvYQz7iddUlO4lk=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=md8BCbvlqWpK0vJkfohik8l4A+xjxIFVAUWa+fDrbVSsFI+RATe7aP2Ktt1dBvRy7hdUl4294IXN9IUzrfAlDo6XYHBdmDHAM8uwZEHfiYj4EPakHJi/pFYP6zIFbIsmzE2N34kBLy04WhNOPMkHH3IdV2adu7Qh8LfG6z/75pQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=omp.ru; spf=pass smtp.mailfrom=omp.ru; arc=none smtp.client-ip=90.154.21.10 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=omp.ru Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=omp.ru Received: from inp1wst083.omp.ru (81.22.207.138) by msexch01.omp.ru (10.188.4.12) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id 15.2.1258.12; Tue, 9 Jul 2024 17:35:23 +0300 From: Roman Smirnov To: CC: Roman Smirnov Subject: [PATCH BlueZ v2 3/4] settings: limit string size in load_service() Date: Tue, 9 Jul 2024 17:35:02 +0300 Message-ID: <20240709143503.12142-4-r.smirnov@omp.ru> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240709143503.12142-1-r.smirnov@omp.ru> References: <20240709143503.12142-1-r.smirnov@omp.ru> Precedence: bulk X-Mailing-List: linux-bluetooth@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: msexch01.omp.ru (10.188.4.12) To msexch01.omp.ru (10.188.4.12) X-KSE-ServerInfo: msexch01.omp.ru, 9 X-KSE-AntiSpam-Interceptor-Info: scan successful X-KSE-AntiSpam-Version: 6.1.0, Database issued on: 07/09/2024 14:15:02 X-KSE-AntiSpam-Status: KAS_STATUS_NOT_DETECTED X-KSE-AntiSpam-Method: none X-KSE-AntiSpam-Rate: 0 X-KSE-AntiSpam-Info: Lua profiles 186394 [Jul 09 2024] X-KSE-AntiSpam-Info: Version: 6.1.0.4 X-KSE-AntiSpam-Info: Envelope from: r.smirnov@omp.ru X-KSE-AntiSpam-Info: LuaCore: 24 0.3.24 186c4d603b899ccfd4883d230c53f273b80e467f X-KSE-AntiSpam-Info: {rep_avail} X-KSE-AntiSpam-Info: {Tracking_from_domain_doesnt_match_to} X-KSE-AntiSpam-Info: 127.0.0.199:7.1.2; inp1wst083.omp.ru:7.1.1; omp.ru:7.1.1; d41d8cd98f00b204e9800998ecf8427e.com:7.1.1; 81.22.207.138:7.1.2 X-KSE-AntiSpam-Info: ApMailHostAddress: 81.22.207.138 X-KSE-AntiSpam-Info: Rate: 0 X-KSE-AntiSpam-Info: Status: not_detected X-KSE-AntiSpam-Info: Method: none X-KSE-AntiSpam-Info: Auth:dmarc=temperror header.from=omp.ru;spf=temperror smtp.mailfrom=omp.ru;dkim=none X-KSE-Antiphishing-Info: Clean X-KSE-Antiphishing-ScanningType: Heuristic X-KSE-Antiphishing-Method: None X-KSE-Antiphishing-Bases: 07/09/2024 14:19:00 X-KSE-Antivirus-Interceptor-Info: scan successful X-KSE-Antivirus-Info: Clean, bases: 7/9/2024 11:26:00 AM X-KSE-Attachment-Filter-Triggered-Rules: Clean X-KSE-Attachment-Filter-Triggered-Filters: Clean X-KSE-BulkMessagesFiltering-Scan-Result: InTheLimit It is necessary to prevent buffer overflow by limiting the maximum string length. Found with the SVACE static analysis tool. --- V1 -> V2: use "%36s[^:]" instead of calculating the string length src/settings.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/settings.c b/src/settings.c index b61e694f1..643a083db 100644 --- a/src/settings.c +++ b/src/settings.c @@ -193,7 +193,7 @@ static int load_service(struct gatt_db *db, char *handle, char *value) return -EIO; } - if (sscanf(value, "%[^:]:%04hx:%36s", type, &end, uuid_str) != 3) { + if (sscanf(value, "%36[^:]:%04hx:%36s", type, &end, uuid_str) != 3) { DBG("Failed to parse value: %s", value); return -EIO; }